Hi Chris,
I have allways had two batteries, just in case. My pumps are supposed to draw 7amps each, thats up to 14amps an hour x 4hrs = 56amps. In winter if the temp is hovering around freezing you can loose 25% of your batteries effeciency. So an 85amp battery will probably give the Equivalent of 64amps.
I have just moved my DI vessell on the right, outside of the container it was in so that I can now put my two new 110amp batteries in next to each other.
Those were supplied by Facelift, give them a ring to see if they will supply you with the 90 degree connecters.
Yes its Protekote on the van floor. Fantastic stuff. Mind you the van floor hardly gets wet, The van has a drainage point under the plastic gaurd at the back of the van, and it drains out at the front on the side door.
Nel.